The data illustrates the average operating profit margin at different stages of the diamond processing value chain as of 2016. At that time, the rough-diamond sales segment of the diamond processing value chain had the highest operating profit margin, ranging between 27 and 28%.
Rough-diamond sales | 27 | 28 |
Cutting and polishing (including trading) | 1 | 2 |
Jewelry manufacturing | 2 | 4 |
Small retailers' sales | 3 | 5 |
Large retailers' sales | 9 | 11 |